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INTANGIBLE ASSETS AND GOODWILL (Goodwill) (Details) - Goodwill - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2019
Dec. 30, 2018
Changes in intangible assets and goodwill [abstract]    
Balance, beginning of fiscal year $ 227,362 $ 226,571
Goodwill acquired 0 692
Other 503 99
Balance, end of fiscal year $ 227,865 $ 227,362